Device for conveying and precipitating dust arising from wood-working machinery



{Nb Model.)

D. D. DRUMMOND. DEVICE PQR OONV BYING AN D PREGIPITATING DUST- ABISING FROM WOOD WORKING MACHINERY.

N0. 3,701,223. Patented July 1, 1884..

:SMRMXA'V 69mm 63, wmwm N. PEYEHS. Pbqlo-Limogmphor. Wmhiugtun. u. c,

NITED STATES PAT NT FFICEQ DAVID D. DRUMMOND, OF CHICAGO, ILLINOIS.

DEVICE FOR CONVEYING AND PRECIPITATING DUST ARISING FROM WOOD-WORKING MACHINERY.

SPECIFICATION forming part of Letters Patent No. 301,223, dated July 1, 1884.

To aZZ whom, it may concern.-

Be it known that I, DAVID D. DRUMMOND, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Devices for Conveying and Precipitating Dust Arising from Wood-Vorking Machinery, 850., of which the following is a specification.

My invention consists in providing suitable mechanical appliances for utilizing steam, preferably from the exhaust, (being the more economical,) for the purpose of precipitating and collecting the dust created principally by wood-working machinery of all kinds, and to separate such dust from coarser or heavier materials -such as shavings, &c.while the material to be cleansed and separated from the dust it contains is being conveyed to a receiving room, box, or other suitable structure by means of a fan or fans, or any method whatsoever, and to effect which I construct the shavings-tower with two compartments, K and N, and employ the combination or equivalent of such as shown in the drawing herewith and forming a part "hereof.

The figure shows a sectional View of the shavings-tower,in which A represents the ordinary flue connected with the fan, and, entering the shavings-tower, discharges on the distributingsurface of shavings-distributer B B, a cone with its apex located centrally beneath the discharge end of the main air-pipe A, (for distributing the air andfor checking the force of its current,) resting on brace O; C, a partition in the tower, open at the top; D, another partition in the tower, open at the bottom; E, air-passage formed by the relative position and construction of partitions O and D, through which the dust is conveyed by the modified current into the steam-compartment N at such a point that before escaping through air-ventLit is brought in contact with the steam discharging through steam-pipe F; F, steam-pipe discharging on the distributing-surface of steam-distributer G; G, cone similar to cone B, for distributing the steam, having a trough around its base to receive the product of condensation and discharge it in waste-pipe H; H, wastepipe for condensed steam; K, main shavingstower; N, steam-chamber and receptacle for the dust after precipitation, connected with compartment K by means of' the opening through the base of partition D and over the top of partition 0.

Operation: The debris entering tower K through pipe A is thrown upon distributor B, which distributes the current of air and scatters the material with which it is charged, permitting the heavier portion to fall, while the dust rises and passes downward through airpassage E into chamber N. As the air charged with dust rises after entering chamber N, it encounters the steam distributed by cone G and condenses the same, which in turn precipitates the dust through the minute subdn vision of the particles of moisture, while the .air rises cleansed and purified and escapes :use of an auxiliary chamber in which to bring the lighter portions of the debris in contact with steam the dust and shavings are separated and the shavings kept dry for fuel, and that distributers differing in form and 0011- struction from cones B and G may be substituted. I therefore do not confine myself to the use exclusively of separate chambers for air and steam, nor to any particular form of construction of distributers B and G; but

hat I claim as new, and desire to secure by Letters Patent, is

1. In a dust-controlling apparatus, in combination with an air and shavings inlet pipe, A, shavings-distributer B, arranged in such a manner as to cause an even distribution of the shavings and dust introduced through pipe A, chamber K, containing said distributer B, airchannel E, connecting the receiving-chamber K at a point above the apex of cone B,with steam-chamber N at a point below the apex of steam-distributer G, located in said chamber N, for the purpose set forth.

2. In combination with the aforesaid air and shavings inlet pipe A, shavingsdistributer B, chamber K, and air-passage E, chamber N, steam-inlet pipe F, steam-distributer G, (ar& ranged in such a manner as to cause an even distribution of the steam when introduced through pipe F in chamber N,) and air-vent L, arranged at such a point in chamber N with reference to steam-distributer G that before escaping the dust-charged air must first pass through the saturated atmosphere, all con- IO structed separately and connectedly substantially as and for the purpose set forth.

DAVID D. DRUMMOND.

Witnesses:

HORACE B; MARTIN, HIRAM H. ScovILLE. 

